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Message-ID:	<edd4aa3d-9c4d-4fa4-ac22-c70767f2c833@maxrnd.com>
Date:	Fri, 25 Apr 2025 14:37:31 -0700
MIME-Version:	1.0
User-Agent:	Mozilla Thunderbird
Subject:	Re: tfind missing a const qualifier.
To:	cygwin AT cygwin DOT com
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From:	Mark Geisert via Cygwin <cygwin AT cygwin DOT com>
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Hi Collin,

On 4/23/2025 8:28 PM, Collin Funk via Cygwin wrote:
> Hi,
> 
> While testing gnulib I noticed that tfind on cygwin is defined like:
> 
>      void *tfind (const void *, void **,
>                   int (*) (const void *, const void *));
> 
> But POSIX requires [1] (*):
> 
>      void *tfind (const void *key, void *const *rootp,
>                  int (*compar) (const void *, const void *));
> 
> For programs written expecting the POSIX prototype, there will be many
> warnings that 'rootp' has it's const qualifier discarded.
> 
> Collin
> 
> [1] https://pubs.opengroup.org/onlinepubs/9799919799/functions/tfind.html
> 
> (*) Ignoring the fact that POSIX.1-2024 added the requirement for
> 'typedef void posix_tnode;'.

Thanks for the report. tfind() and friends are supplied by newlib. I 
will look into what exactly to report there and/or send a patch there. 
It appears a bit more from that POSIX version needs implementation.

..mark

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